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US Patent: 2,807,091
Keyway Checkers
Patentee:
Fred E. Michelson (exact or similar names) - Walpole, MA

USPTO Classifications:
33/519, 33/645, 33/812

Tool Categories:
layout tools : measurement gauges

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
none listed
Patent Dates:
Applied: Jul. 26, 1954
Granted: Sep. 24, 1957

Patent Pictures:
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Report data errors or omissions to steward Joel Havens
Description:
James R. Hoddes - patent attorney

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